Substrate for in-plane switching mode liquid crystal display device with capacitors connected by extending lines and method for fabricating the same

Abstract

An array substrate for an in-plane switching liquid crystal display device includes a substrate, a gate line and a common line on the substrate, the gate and common lines disposed parallel to and spaced apart from each other, a gate insulator on the gate and common lines, and a data line substantially perpendicular to the gate and common lines on the gate insulator such that a pixel region defined by the gate and data lines. The pixel region is divided into first and second pixel region by the common line. A thin film transistor is adjacent to a crossing portion of the gate and data lines, the thin film transistor having a drain electrode. A first storage electrode is on the gate insulator over the common line, and the first storage electrode connected to the drain electrode. A second storage electrode is on the gate insulator over the gate line, and the second storage electrode connected to the first storage electrode. A common electrode is connected to the common line and has a plurality of extended portions at the first pixel region perpendicular to the common line. A first pixel electrode at the first pixel region is connected to the drain electrode and has a plurality of extended portions perpendicular to the common line. The plurality of extended portions of first pixel electrode alternate with the plurality of extended portions of common electrode.

1. An in-plane switching liquid crystal display device, comprising:
 first and second substrates;  
 a gate line and a data line defining a pixel region on the first substrate;  
 a common line parallel to and spaced apart from the gate tine in a middle section of the pixel region;  
 a thin film transistor adjacent to a crossing portion of the gate and data lines, the thin film transistor having gate, source, and drain electrodes;  
 a first insulating layer on the gate line and common line;  
 a transparent common electrode on the first substrate and having a plurality of extended portions perpendicular to the common line;  
 a plurality of transparent pixel electrodes on the first substrate and having a plurality of extended portions perpendicular to the common line;  
 extended portions extending from the common line between a boundary of the pixel region and an outermost extended portion of the common electrode, wherein the extended portions extending from the common line are on a layer different from the common electrode;  
 a first storage electrode on the first insulating layer over the common line;  
 a second storage electrode on the first insulating layer over the gate line, wherein the first and second storage electrodes are connected to the drain electrode by extended lines on a layer different than the pixel electrodes;  
 and a liquid crystal layer between the first and second substrates, wherein the plurality of extended portions of the pixel electrodes have an alternating pattern with the plurality of extended portions of the common electrode.  
 
     
     
       2. The device of  claim 1 , wherein the common electrode is connected to the common line. 
     
     
       3. The device of  claim 1 , wherein the gate and data lines have the same material. 
     
     
       4. The device of  claim 1 , wherein the common and pixel electrodes include one of indium-tin-oxide or indium-zinc-oxide. 
     
     
       5. The device of  claim 1 , wherein the common electrode has a substantially zigzag shape. 
     
     
       6. The device of  claim 1 , wherein the pixel electrode has a substantially zigzag shape. 
     
     
       7. The device of  claim 1 , wherein the pixel region is divided by the common line. 
     
     
       8. The device of  claim 1 , wherein the second storage electrode is connected to the pixel electrode. 
     
     
       9. The device of  claim 8 , wherein the second storage electrode is connected to the drain electrode. 
     
     
       10. The device of  claim 1 , wherein the extended portions are substantially perpendicular to the common line. 
     
     
       11. The device of  claim 1 , further comprising a transverse common electrode over the common line. 
     
     
       12. The device of  claim 11 , wherein the transverse common electrode contacts the common line through at least one contact hole. 
     
     
       13. The device of  claim 11 , wherein the first storage electrode is between the common line and the transverse common electrode.